BARRAQUER, BARCELONA, ISM / SCIENCE PHOTO LIBRARY BARRAQUER, BARCELONA, ISM / SCIENCE PHOTO LIBRARY
Occlusion of the central retinal artery. Fundoscopy image of the retina of the left eye of a patient with central retinal artery occlusion (CRAO). The retina is the light-sensitive layer at the back of the eye. The occulsion has resulted in oedema of the retina and the formation of a symptom known as a cherry-red spot on the macula. CRAO is where the flow of blood through the central retinal artery is blocked (occluded). A common cause is carotid artery atherosclerosis. If not treated, CRAO can lead to blindness.
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